Definitely sounds different than most Civics, but I don't like it any more or less. Is there any gain in performance or was this 100% for sound?

Don't even start on that Ferrari BS. Watch C'etait Un Rendezvous and we'll talk. It's been argued back and forth on what car is in the video, but that is what a fine-tuned exotic sounds like. Here: http://www.youtube.com/watch?v=fLC3-BciWlk

Definitely sounds different than most Civics, but I don't like it any more or less. Is there any gain in performance or was this 100% for sound?

Don't even start on that Ferrari BS. Watch C'etait Un Rendezvous and we'll talk. It's been argued back and forth on what car is in the video, but that is what a fine-tuned exotic sounds like. Here: http://www.youtube.com/watch?v=fLC3-BciWlk